What three statements about REP configurations on a Cisco ME 3400 switch port are true?
(Choose three.)

A.
The port must be an NNI type and must be in trunk mode.

B.
The rep segment number command is used to enable REP on the switch port.

C.
A REP segment cannot be wrapped into a ring topology.

D.
The port where the segment terminates is called the edge port.

E.
If a failure occurs within the segment, the blocked port goes to the forwarding state

F.
Ports are never blocked in a given segment